You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Alexander Nelson here, I want to reserve my ticket from CLT to SEA, can you please help me to book a ticket?

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: Sure, my preferable dates of journey is from 08/19 to 08/21. I want a direct flight.

ASSISTANT: Ok, wait for some time.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting there is no flights found on your details.

USER: That's fine. Thank you for your service.

ASSISTANT: Thanks for approaching us.