You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Thomas Adams.

ASSISTANT: Nice to meet you Thomas. How may I assist you today?

USER: I would like to go to Washington to submit my final year project, could you help me to book a flight from IAH to IAD?

ASSISTANT: Sure, on which dates you want to travel?

USER: Sure, my planned dates are from 07/22 to 07/24.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry Adams, I cannot find any flights with your name.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thanks for contacting us. Have a great day.