You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please book me a flight ticket ticket from DFW to SFO to meet my family?

ASSISTANT: Your travelling dates please?

USER: I have planned to travel on Apr 16th and return on Apr 18th.

ASSISTANT: Do you have any connection limit?

USER: I like connecting flight.

ASSISTANT: Is there any specifications?

USER: No, thanks.

ASSISTANT: There is a flight with single in Delta airlines, can I proceed for booking in 1002 flight?

USER: Ok, please book this ticket.

ASSISTANT: On which name can I proceed for booking?

USER: John Johnson.

ASSISTANT: Your booking is done in economy class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.