You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please share your journey dates?

USER: My planned dates of journey are Apr 22 and Apr 24.

ASSISTANT: Do you have any specifications?

USER: I prefer normal cost airlines for this trip.

ASSISTANT: Is there any class preferences?

USER: No.

ASSISTANT: May I know your good name?

USER: My name is Susan Thompson.

ASSISTANT: Sorry, no flights found on your given details.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for choosing us.