You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please book me a flight ticket from DEN to LAX to meet my family?

ASSISTANT: Yes, can you share me your dates of travel?

USER: I have planned to travel on Feb 17th and return on Feb 19th.

ASSISTANT: Do you have any other preferences?

USER: I like one connecting flight.

ASSISTANT: Can I know your name?

USER: Thomas Hill.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you so much.