You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please reserve a flight to travel on Sept 6th?

ASSISTANT: Sure, we are here to help you. Can you share me your return journey date?

USER: I will be returning back on Sept 8th.

ASSISTANT: Where you need to catch the flight and land?

USER: I want to travel from OAK to IAH.

ASSISTANT: Is there any class preference for you?

USER: I don't have any preference.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Do you need any break in your journey?

USER: I am fine with anything.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: No worries, thank you for the information.

ASSISTANT: For documentation, may I know your good name please?

USER: My name is Laura Martinez.

ASSISTANT: Thank you for reaching us.

USER: You welcome.