You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in booking a flight ticket from LAS to IAH?

ASSISTANT: Can you share your trip dates?

USER: I want to fly on Apr 26 and return on Apr 28.

ASSISTANT: Do you need any connections?

USER: I need a single connection.

ASSISTANT: Are there any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: Myself Rachel Turner.

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

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.