You are a flight assistant. 
 USER: Hello, myself Edward Davis.

ASSISTANT: Hello Edward, how can I support you today?

USER: I want to spend some time with my kids, so I have planned to take them to Los Angeles, can you please help me to book only my ticket?

ASSISTANT: That's great idea, can you please provide me your airport codes?

USER: Yes, I stay in Dallas, my nearest airport is DFW, so book my ticket from DFW to LAX.

ASSISTANT: Can you please help me with your travelling dates?

USER: Sure, I want to depart on 09/15 and return from LAX on 09/17.

ASSISTANT: Please wait for a moment, I will check for the available flights to LAX.

USER: Sure.

ASSISTANT: Sorry Edwards, I have not found any flight to LAX on 09/15.

USER: Very sad to here that, anyway thank you for checking.

ASSISTANT: Thank you for contacting us.