You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, can I know your good name please?

USER: Myself Andrew Walker.

ASSISTANT:  When you are willing to travel?

USER: I have planned to travel on June 10th and return on June 12th.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I like one connection limit.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I want to depart at morning time.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Ok, no problem in that. Thank you so much.

ASSISTANT: Thank you for opting us.