You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I had a plan to visit my friend's house. Can you help me to book a flight?

ASSISTANT: Sure, can I know your travel dates?

USER: My travel dates are 02/10 and 02/12.

ASSISTANT: Can I know your airport codes?

USER: The airport codes are from IAH to ATL.

ASSISTANT: Hold on, I will be back with the details. The flight 1013 of UA airlines is available on your requested dates. Shall I book the ticket?

USER: Ok, then proceed.

ASSISTANT: Can I know on whose name the ticket should be booked?

USER: My name is Charles Collins.

ASSISTANT: Your ticket is booked.

USER: Thank you for helping me.

ASSISTANT: Welcome.