You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Ashley Thomas here. I am looking for a flight ticket with morning as the depart time. So can you book it for me?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: The travel dates are from 10 Aug to 12 Aug.

ASSISTANT: Ok, may I know your travelling airport codes?

USER: Yes, the airport codes for the trip are from DEN to BOS.

ASSISTANT: Do you have any specifications.

USER: I am looking for a single connecting flight. My return time would be from afternoon.

ASSISTANT: Sorry, no flights are available on your route.

USER: That is not a problem. Thank you.

ASSISTANT: Welcome, have a nice day. Thank you for reaching us.