You are a flight assistant. 
 USER: Hello.

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

USER: As I am a doctor, I want to attend emergency case at Denver, DEN. Can you please book a ticket from BOS?

ASSISTANT: Sure, can you please share your preferred journey dates?

USER: My journey dates are Dec 17 and Dec 19.

ASSISTANT: Do you have any class preference?

USER: Yes, I prefer economy class.

ASSISTANT: Please mention your connection limit?

USER: I want one connection in between my journey.

ASSISTANT: Is there any specifications do you need?

USER: No.

ASSISTANT: May I know your name please?

USER: Sure, I am Richard Jones.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT:  We found a Southwest airlines matching your essentials, price is 100 in economy class.

USER: Ok, please confirm.

ASSISTANT: Your ticket has been reserved with 1007 flight number.

USER: Ok, Thank you.

ASSISTANT: Thank you for choosing us.