You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I be your helping hand today?

USER: Can you please book a flight ticket on dates Apr 28 and Apr 30?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are IAD and BOS.

ASSISTANT: Ok, do you need any break in between the journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, do you prefer business or economy class?

USER: I want a ticket in economy class.

ASSISTANT: Do you have any other preferences?

USER:  No.

ASSISTANT: We found a UA airline with fare of 100 and a break in between the journey. Your ticket has been confirmed with flight number 026.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER:          My name is Patricia Smith.

ASSISTANT: Thank you for reaching us.