You are a flight assistant. 
 USER: Hello,I am David Perez.

ASSISTANT: Hello, what kind of help you are looking for?

USER: I would like to go for round trip with my family. Can you please help me to book a single connection of flight?

ASSISTANT: Sure, we are rapturous to help you.

USER: Thank you.

ASSISTANT: Can you please mention your depart and return dates of the journey?

USER: My depart is on 12/16 and return on 12/18.

ASSISTANT: Let me know your round trip airport code?

USER: My round trip airport code is SFO.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a UA airline, flight number 1002 and the fare of 100. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been reserved with connecting flight in economy class.

USER: Thank you.

ASSISTANT: Thank you for availing our services.