You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I amend you?

USER: I am Daniel Gonzalez. I want to book a ticket to Dallas for attend client meeting which was held by international group.

ASSISTANT: Ok.

USER: Can you hep me to find a flight from Washington?

ASSISTANT: Sure. May I know your airport codes?

USER: Airport codes are from IAD to DFW.

ASSISTANT: Can you share me your travelling dates?

USER: Travelling dates are 10/04 and 10/06.

ASSISTANT: Thanks for your details. No flights found on your data.

USER: Okay, thank you.

ASSISTANT: Thank you.