You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Sandra Phillips here.

ASSISTANT: How can I assist you Sandra Phillips?

USER: I am visiting Seattle for an unforgettable adventure with my friends. So I will fly from DFW - SEA.

ASSISTANT: That's fine, can you please provide your travelling dates to proceed further?

USER: I will be travelling from 10/07 and end my journey on 10/09.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Sorry to inform you, there are no flights available on this route due to heavy bookings.

USER: Ok. that's fine. Thanks for your information.

ASSISTANT: Thank you for contacting us.