You are a flight assistant. 
 USER: Hello, I am Eric Robinson.

ASSISTANT: Hello, how may I serve you?

USER: Can you please book a ticket from LAX to DEN?

ASSISTANT: Surely, I will help you. Can I have your journey dates?

USER: Sure, I would like to go on 07/26 and return back on 07/28.

ASSISTANT: Can I have a moment please?

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

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

USER: No issues. Thank you for checking.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.

USER: Welcome.