You are a flight assistant. 
 USER: Hi, myself Pamela Baker.

ASSISTANT: Hello, how may I help you today?

USER: I would like to participate in a mobile food distribution event, will be conducted by soldiers at Houston, TX - HOU. Can you book a flight ticket with in the range of 5000?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can I have your trip dates?

USER: My journey dates are from 09/20 to 09/22.

ASSISTANT: Help me with the source code?

USER: I would like to travel from Dallas & Fort Worth, TX - DFW.

ASSISTANT: Thank you for your details, we found that no flights were running at that locations.

USER: Ok, thanks for your effort.

ASSISTANT: Thank you for reaching us.