You are a flight assistant. 
 USER: Hello,. I am Alexander Roberts.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: Can you help me in booking a flight ticket from HOU to EWR?

ASSISTANT: Sure, I am gleeful to assist you.

USER: Thank you.

ASSISTANT: When did you scheduled to depart & return?

USER: I want to return in the afternoon time.

ASSISTANT: Ok, which type of class do you prefer for your journey?

USER: No.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I want to travel on 01/17, and return on 01/19.

ASSISTANT: Do you need any break in between journey?

USER: I am comfortable with any break.

ASSISTANT: Thanks for your details, there are no flights available at this moment matching your particulars.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thanks for communicating with us, have a nice day.