You are a flight assistant. 
 USER: Hello. I am Helen Smith.

ASSISTANT: Hello, how can I respond to your request?

USER: I need to attend a meeting at Houston, can you help me to book a flight ticket from SEA to HOU?

ASSISTANT: Sure, I am gleeful to assist you.

USER: Thank you.

ASSISTANT: May I know your journey dates please?

USER: I am travelling from June 26 to June 28.

ASSISTANT: Do you need any whistle stop in between your journey?

USER: Yes, I need.

ASSISTANT: What is your expected budget for your ticket?

USER: I can afford up to 1000.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Sure, please book a business class flight ticket.

ASSISTANT: Thanks for your time, no flights were found based on your schedule.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.