You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your name?

USER: My self Betty Robinson.

ASSISTANT: What can I do for you?

USER: I want to book a flight under the price 200. Can you help me to book a flight ticket?

ASSISTANT: Ok, to proceed further we need to know your dates of journey. Can you please share them?

USER:  Sure, 08/20 and 08/22 are my travelling dates.

ASSISTANT: Ok, can you provide your airport codes?

USER: Nv-LAS and TX-AUS are my airport codes.

ASSISTANT: Thank you. There is a flight available matching your particulars.

USER: You can proceed booking with this airline.

ASSISTANT: Your booking is done with flight 1002 and price of 100.

USER: Thank you.

ASSISTANT: Thank you for reaching us.