You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Can you share your trip dates?

USER: My travelling dates are Apr 30 to May 2.

ASSISTANT: Do you need any connections?

USER: I need a single connection of flight.

ASSISTANT: Are there any other preferences?

USER: I want to return in the morning.

ASSISTANT: May I know your name?

USER: Joshua Perez.

ASSISTANT: Sorry, there is no flight found with your details.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.