You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Can you please assist me to book a flight ticket from IAH to BOS to meet my cousin?

ASSISTANT: Sure, May I know the journey dates?

USER: Sure, my travelling dates are on 2 and 4 on the month of Feb.

ASSISTANT: May I know your name?

USER: Sure, my name is Jack Adams.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Please wait a minute.

USER: Make sure that my depart time is evening and arrival time is afternoon.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, thanks for your assistance.

ASSISTANT: Thank you for opting us.