You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Betty Allen. As my friends planning to go for technical tour to Space Center at Houston.

ASSISTANT: Ok.

USER: Can you help me with book a flight ticket with a connecting flight?

ASSISTANT: Sure, I will help you. May I know your travel dates please?

USER: My travelling dates are from 01/23 to 01/25.

ASSISTANT: Could you please provide me your airport codes, please?

USER: My source and destination codes are Chicago, ORD to Houston, IAH.

ASSISTANT: Do you have any other specifications?

USER: Make sure that price limit is 200.

ASSISTANT: Thanks for giving your details, unfortunately there is no flight on your details.

USER: Ok, No problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you.