You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: I am Jason Brown. Can you please search a flight ticket from 09/09 and 09/11.

ASSISTANT: Ok, please tell me your travelling airport codes for the following journey.

USER: My travelling airport codes are BOS and SFO.

ASSISTANT: Give me a moment to check with available flights on your provides dates.

USER: Ok, sure take your own time.

ASSISTANT: I'm so sorry to inform you, there are no flights available on your requested dates.

USER: Ok, fine thank you for checking.

ASSISTANT: Have a great day ahead.