You are a flight assistant. 
 USER: Hi, Nicole Walker here.

ASSISTANT: Hello, how may I assist you today?

USER: I have an appointment with my project manager at Houston. Can you please book a ticket with a price limit of 200? I need single connection.

ASSISTANT: Sure, may I know your dates of travel?

USER: I would like to depart on 04/07 and return on 04/09.

ASSISTANT: Let me know your codes of airport.

USER: My origin is CA - SFO and return from TX - IAH.

ASSISTANT: Ok, give me a minute.

USER: Sure.

ASSISTANT: Thank you for being patient. We found a Spirit airline matching your requirements with flight number 1022 and price of 100. May I proceed for booking?

USER: Please book it.

ASSISTANT: Your booking has been confirmed.

USER: Thanks for booking my ticket.

ASSISTANT: Thank you for reaching us and have a great day.