You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Angela Green.

ASSISTANT: How can I serve you?

USER: I would like to travel from EWR to HOU, can you help me to book a flight ticket?

ASSISTANT: Sure, May I know your travelling dates?

USER: I am travelling from July 28 to July 30.

ASSISTANT: Do you have any preferences?

USER: Please ensure the book a return flight ticket in the evening time.

ASSISTANT: Thanks for your details. There are no flights found on your data.

USER: No issues, thank you for the information.

ASSISTANT: Thank you.