You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I am Nicole Williams. Can you please help me in booking a flight ticket from IAH to BOS?

ASSISTANT: Sure, I am pleased to help you. Please let us know your start and return dates.

USER: I would like to fly on Jan 01 and return on Jan 03.

ASSISTANT: What time do you prefer to depart and return?

USER: I would like to depart in evening time.

ASSISTANT: Sure, do you have any class preference?

USER: No, I am comfortable with any class.

ASSISTANT: Let me know if you have any other preference.

USER: I need a single connection.

ASSISTANT: Sorry, there is no flight available with your respective dates of travel.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.