You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Samuel Anderson. Can you please book me a ticket from IAH to SEA, as I am going there to meet a friend?

ASSISTANT: Sure, I am here to help you. Can you please share your planned journey dates?

USER: Sure, my trip dates are June 20 and June 22nd.

ASSISTANT: Let me know your fare limit.

USER: I can afford up to 5000.

ASSISTANT: Give me a minute, I will let you know the flight availability.

USER: My return time should be in the evening time. Sure.

ASSISTANT: Thank you for waiting. I am sorry to inform you that, there were no flights available that  matches your requirements.

USER: Ok, no problem. Anyways, thank you for the information.

ASSISTANT: Thank you for opting us.