You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Richard Green here.

ASSISTANT: How may I guide you today?

USER: Can you book a connecting flight ticket to Houston?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Can you please share your preferable journey dates?

USER: My journey dates for the travel would be from 02/11 to 02/13.

ASSISTANT: Can you please mention your source and destination airport codes to proceed further?

USER: The price limit is less than 1000.

ASSISTANT: Ok.

USER: My airport codes for boarding the flight are CLT to IAH.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for contacting us.