You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I serve you today?

USER: I want to go for shopping to buy accessories at Houston, TX - HOU. Will you help me in booking a fight with a fare of 200?

ASSISTANT: Sure, I am here to help you, may I know your  travelling dates?

USER: Sure, my travelling dates are 09/15 and 09/17.

ASSISTANT: May I know your source code?

USER: My source is Chicago, IL - ORD.

ASSISTANT: There is a UA 1000 airline with fare of 100 which matches your travelling dates. Shall I proceed with booking?

USER: Ok, you can proceed.

ASSISTANT: May I know your name?

USER: My name is Catherine Harris.

ASSISTANT: Your booking has been confirmed on name of Catherine Harris.

USER: Thank you.

ASSISTANT: Thank you for approaching us.