You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Richard Jackson. I would like to enjoy with my friends at Disney land, Los Angeles. Can you help me in my booking?

ASSISTANT: Sure, please share me your travelling dates?

USER: I will start my journey on 05/20. I will return on 05/22.

ASSISTANT: Kindly assign me your airport codes?

USER: My source airport code is Phoenix, AZ - PHX. My destination airport code is Los Angeles, CA - LAX.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, to inform you that there are no flights with your specifications.

USER: Not an issue. Thank you for your quick response.

ASSISTANT: Thank you for reaching us.