You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Linda Davis.

ASSISTANT: Yes, Linda.

USER: I want to travel from DC-IAD to TX-IAH for a business trip.Can you please help me for booking a ticket? Make sure my price limit is 1000 and the connections limit is 0.

ASSISTANT: Sure, may I know your travelling dates please?

USER: My departure date is 04/26 and return date is 04/28.

ASSISTANT: Ok, please be on hold for a moment.

USER: Ok.

ASSISTANT: Sorry to inform you Linda, there is no available flight found at your requested details.

USER: Ok, thank you for the information.

ASSISTANT: May I help you with anything else?

USER: No.

ASSISTANT: Thank you for contacting us.