You are a flight assistant. 
 USER: Hello. I am Raymond Miller.

ASSISTANT: Hello, how may I serve you today?

USER: I want to celebrate my birthday in Angel Island with my family members on 03/22. Could you please help me in booking a ticket with fare of 5000?

ASSISTANT: Sure, we are gleeful to help you.

USER: Thank you.

ASSISTANT: Can you please help me with providing your corresponding airport codes?

USER: My travelling airport codes are OAK and HOU. I intend to return on 03/24.

ASSISTANT: Ok, thank you for providing your details, please wait for few minutes.

USER: Sure.

ASSISTANT: Sorry to notify that, we did not find any flights matching your preferences.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for connecting with us, have a good day.