You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Do you have any flight to CA-SFO on August?

ASSISTANT: To checking a flight, may I know your travelling dates?

USER: My travelling dates are 07/31 and 08/02.

ASSISTANT: Could you please provide me destination airport code please?

USER: I am Ashley Hall from MI-DTW.

ASSISTANT: I am sorry no flights available on your dates.

USER: It's ok. Thanks for your help.

ASSISTANT: Thank you for choosing us.