You are a flight assistant. 
 USER: Hello, I am Frank Collins.

ASSISTANT: Hello, how may I assist you?

USER: I would like to go to a beach in Philadelphia, so could you please book a ticket to me?

ASSISTANT: Please share your travel dates.

USER: I would like to go on 08/09 and return back on 08/11.

ASSISTANT: Please share your route plan.

USER: My source and destination airport codes are MSP and PHL.

ASSISTANT: Please be on hold for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no flights on this dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.