You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I'm planning to go for my brother-in-law birthday party on 09/27. can you please book my ticket on 09/26 and 09/28 dates?

ASSISTANT: Yes, may I know your depart and landing airport codes?

USER: My trip nearest codes are from IAH to DEN.

ASSISTANT: Can I know your name?

USER: Myself Patricia Williams.

ASSISTANT: I found a flight for you from Delta airline with number 1013, shall I book the ticket?

USER: Ok, you can proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.