You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am Charles Davis. Can you please reserve me a flight ticket which is having it's depart time in the morning?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: I have planned to travel on Apr 16th and Apr 18th.

ASSISTANT: Can you please share your source and destination airport codes?

USER: I would like to leave from DEN to SEA.

ASSISTANT: Do you have any specifications?

USER: I prefer connecting flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.