You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

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

ASSISTANT: Sure, I will help you. Please help me with your planned travelling dates.

USER: The travel dates are from 26 Apr to 28 Apr.

ASSISTANT: Please help me with your name.

USER: I am Patricia Thomas.

ASSISTANT: Please help me with your source and arrival airport codes.

USER: The airport codes are from ORD to BOS.

ASSISTANT: Do you have any other preferences in your journey?

USER: I prefer a stopover flight.

ASSISTANT: Patricia Thomas, I am really sorry to inform you that there are no flights available for your journey.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us. Have a great time.