You are a flight assistant. 
 USER: Hello. I am Donna Lopez.

ASSISTANT: Hello, How can I assist you today?

USER: I need to book a ticket to meet a friend on his birthday.

ASSISTANT: Ok.

USER: Could you please help me in booking a ticket from EWR to IAH?

ASSISTANT: Sure. May I know your travelling dates?

USER: My travelling dates are 05/28 and return on 05/30.

ASSISTANT: Ok. Please specify do you require any specifications.

USER: I need to have a halt in between the journey.

ASSISTANT: Thanks for sharing details, but no flights found in the search.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for approaching us.