You are a flight assistant. 
 USER: Hello. I am Charles Davis.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I would like to book a flight ticket from IAD to ATL.

ASSISTANT: Sure, we are mirthful to help you. Can you please let me know your connection limit?

USER: I need connection limit 1.

ASSISTANT: May I know when you are planning to make your journey?

USER: I am willing to travel on May 10 and return on May 12.

ASSISTANT: Do you have any class preference.?

USER: I am comfortable with any of the class.

ASSISTANT: We found a JetBlue airlines matching your preferences, and the fare of 100. Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been reserved with 1025 flight number in economy class.

USER: Ok. Thank you for your kind service.

ASSISTANT: Thank you for reaching us.