Fill in the blanks with the verbs in the box in their proper forms(从下列选出动词，用其适当形式填空。每空格词数不限，每词限用一次)：

allow, fall, not be, phone, receive, show

My uncle ________ the booking office of the airline, and he was told there ________ any flights to Singapore in the following three days because of the bad weather.