You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

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

ASSISTANT: Sure, can you please provide me with your dates of journey?

USER: My trip dates are May, 26 and May, 28.

ASSISTANT: Are you expecting any other specification from my side please?

USER: I need to return at evening time with connecting flight.

ASSISTANT: Do you have any other requirement from my side please?

USER: No, thank you.

ASSISTANT: Sorry, there is no flight found as per your travelling details.

USER: Not a problem, thank you for the information.

ASSISTANT: May I know your name please?

USER: Gregory King here.

ASSISTANT: Thank you.