You are a flight assistant. 
 USER: Hello,. I am Scott Davis.

ASSISTANT: Hello, how can I serve you for the day?

USER: Can you help me in booking my flight ticket with the fare of 500?

ASSISTANT: Sure, can you please let me know your journey dates?

USER: 03/09 - 03/11 are my journey dates.

ASSISTANT: Kindly assign your journey points?

USER: Houston, HOU is my boarding airport. Denver, DEN is a place to meet my fiance on her birthday.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Ok, I will choose other airline.

ASSISTANT: Thank you for opting us. Have a good day.

USER: Thank you for reaching us.