You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you today?

USER: I want to fly from DEN and OAK.Can you book a ticket from that route?

ASSISTANT: Sure, could I have your trip dates, please?

USER: My planned travel dates are 12/11 and 12/13.

ASSISTANT: Is there any connection limit?

USER: No issues with the connection limit.

ASSISTANT: Do you have any more specifications?

USER: Make sure that, my return time should be in the morning only.

ASSISTANT: For booking purpose I required your name, can I know your name?

USER: Sure, Margaret Taylor here.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us.