You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Katherine Hall.

ASSISTANT: What can I do for you now?

USER: I would like to conduct a film festival at Houston. Please, help me in my reservation.

ASSISTANT: To help you, shall I have your airport codes?

USER: Sure. My source airport code is Philadelphia, PA - PHL. My destination airport code is Houston, TX - IAH.

ASSISTANT: Are you having any price limit?

USER: I can pay up to 1000.

ASSISTANT: Please share your journey dates.

USER: I will start my journey on 06/25. I will return on 06/27.

ASSISTANT: Wait a minute, I will get back to you.

USER: Sure.

ASSISTANT: Unfortunately, there are no flights available for you.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for connecting us.