You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: My name is Frank Martinez, I want to book a flight ticket to celebrate my sister birthday at BOS, can  you help me with booking a connecting flight?

ASSISTANT: Sure, may I know your travelling dates?

USER: My depart date is Oct 05 and arrival date is Oct 07.

ASSISTANT: From where do you want to board?

USER: My boarding point is DTW.

ASSISTANT: Can I know your flight timings?

USER: I prefer to return in the afternoon time.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: Do you need a economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: There are no flights available.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.