You are a flight assistant. 
 USER: Hello, I am Alexander Hernandez.

ASSISTANT: Hello, how may I aid you?

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

ASSISTANT: Sure. Please share your travel dates.

USER: I would like to go on 06/29 and return back on 07/01.

ASSISTANT: Please provide your nearby airport codes.

USER: My source and destination airport codes are SFO and DFW.

ASSISTANT: Please wait for a while.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: Sorry, there is no flight available on your route.

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

ASSISTANT: Thank you for reaching us.

USER: Welcome.