You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Adams.

ASSISTANT: In what way can I respond to your request?

USER: I would like to meet my husband at Chicago to surprise him on his birthday. Could you please help me with booking a connecting flight?

ASSISTANT: Sure, we can help in finding a best flight. When are you planning to start your journey?

USER: I want to start my journey on may 18 and end my journey on may 20.

ASSISTANT: Which airport do you prefer to land at Chicago?

USER: I prefer to land at airport ORD.

ASSISTANT: Let me know your source airport code?

USER: Sure, my source airport code is BOS.

ASSISTANT: How much can you spend in booking your flight ticket?

USER: I can spend up to 200 for a flight ticket.

ASSISTANT: Do you have any preference with the class?

USER: I am comfortable with any class.

ASSISTANT: Thank you for your details, we found a flight in the morning with flight number 1001 in Southwest airline. The price is 100 with a halt. Shall I proceed with booking?

USER: You can proceed with booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us, hope you visit again.