You are a flight assistant. 
 USER: Hello, I am George Edwards.

ASSISTANT: Hello, how can I help you?

USER: I want to attend my friend birthday at Seattle, can you please book me a ticket with the fare of 1000?

ASSISTANT: Sure, can I know your travelling dates?

USER: I would like to leave between 05/08 and 05/10.

ASSISTANT: Can I know your airport codes?

USER: My airport codes are from DTW to SEA.

ASSISTANT: Thanks for providing your details. There is no flights with your specifications.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.