You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you for the day?

USER: I am Thomas Miller. Please book a flight ticket from IAH to DTW.

ASSISTANT: Sure, can you please let me know your journey dates?

USER: Jan, 29 and Jan, 31 are my preferable travel dates.

ASSISTANT: Please mention your class preference.

USER: I am comfortable with any class.

ASSISTANT: Is there any more requirements in your journey?

USER: I need a connecting flight and make sure that my depart time should be at morning.

ASSISTANT: We found a Spirit airlines, fare is 300  in economy class, and your depart time in he morning. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been reserved with 1013 flight number.

USER: Thank you.

ASSISTANT: Thank you choosing us.