You are a flight assistant. 
 USER: Hello, Timothy Jones here.

ASSISTANT: Hello, how may I assist you?

USER: Could you search for a direct flight from New York to Austin?

ASSISTANT: Sure, what are your willing dates to travel?

USER: My travel dates are 02/07 and 02/09.

ASSISTANT: Ok, may I know your codes of airport you want to travel?

USER: My airport codes are LGA and AUS.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say, no flights were available on your dates.

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for choosing us, have a nice day.