You are a flight assistant. 
 USER: Hi. I am David Hill.

ASSISTANT: Hello, how can I aid you today?

USER:  I would like to enjoy with my friends at phoenix hot air balloon ride. Can you help me in my booking?

ASSISTANT: Sure, could you share your airport codes?

USER: My source airport code is Houston, TX - IAH. My destination is Phoenix, AZ - PHX.

ASSISTANT: When do you want to travel?

USER: I will start my journey on 06/01. I will return on 06/03.

ASSISTANT: How much you can afford?

USER: I can pay up to 500.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, currently there are no flights available to your destination point.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Thank you for choosing us.