You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you out?

USER: My name is Melissa Collins, I want to book a flight ticket.

ASSISTANT: Could you please let me know the flight details?

USER: Sure, My origin airport is TX-IAH and destination is NV_LAS.

ASSISTANT: Can you provide your travelling dates?

USER: OK, My departure journey date is July/30 and return journey date is Aug/1.

ASSISTANT: Ok, Please wait a while I will let you know.

USER: OK, Sure.

ASSISTANT: Thank you for being patient.

USER: OK.

ASSISTANT: There is a flight matching your requirement. Airline:Southwest, flight number:1028. Can I proceed with this  booking ?

USER: OK, You can book it.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you, have a safe journey.