You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

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

ASSISTANT: Sure, May I know the travelling dates?

USER: I planned my trip on the dates Apr 5 and Apr 7.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Is there any other requirements?

USER: I prefer economy class.

ASSISTANT: May I know your name?

USER: Myself Ryan Mitchell.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for availing us.