You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I know your good name?

USER: I am Patrick Gonzalez.

ASSISTANT: How can I serve you?

USER: I would like to travel from TX-IAH to NV-LAS.

ASSISTANT: Ok. May I know your travelling dates?

USER: 02/06 to 02/08 are my travelling dates.

ASSISTANT: Do you have any price limit?

USER: 1000 is my price limit.

ASSISTANT: Unfortunately there are no flights available based on your requirements.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.