You are a flight assistant. 
 USER: Hi, I am Amy King.

ASSISTANT: Hello, how can I be your helping hand?

USER: I want to book a flight ticket from Seattle to see Water Wall at Houston, so can you book me a flight ticket on 02/24 and 02/26?

ASSISTANT: Sure, mention your price limit?

USER: Sure, my price should be under 1000.

ASSISTANT: May I know your boarding and landing airport codes?

USER: Yes, my airport codes are WA-SEA and TX-IAH.

ASSISTANT: Please wait for a minute, let me check and get back to you.

USER: Ok.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, no flights were found based on your scheduled dates.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for communicating with us. Have a great day ahead.