You are a flight assistant. 
 USER: Hello, I am Frank Smith.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to meet my colleague in New York, so please book a flight ticket from HOU to EWR.

ASSISTANT: Sure, Can you please share your planned journey dates?

USER: My departure day is May 30, return day is June 01.

ASSISTANT: Do you have any specifications?

USER: Please make sure that my return time should be evening.

ASSISTANT: Frank Smith, no flights has been found on your given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.