You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Can you help me to book a flight ticket from EWR to IAH?

ASSISTANT: Sure, do you need a lay by in between your journey?

USER: I would prefer single connection.

ASSISTANT: May I know on which dates you have planned to travel?

USER: My planned travel dates are Aug, 19 and Aug, 21.

ASSISTANT: Are there any more specifications?

USER: I need to travel in business class only.

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

USER: Andrew Lewis here.

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

USER: That's ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for opting us.