You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me to book a flight ticket from IAD to reach IAH? Because I have planned to meet my childhood friends.

ASSISTANT: Sure, may I know your travel dates?

USER: Thank you for accepting my request. I would like to travel on these dates Jan 26 and Jan 28.

ASSISTANT: Do you have any specifications?

USER: I am looking for a flight which is departing in the morning time.

ASSISTANT: May I know your name?

USER: My name is Gregory Perez.

ASSISTANT: Ok, please wait a minute.

USER: Ok, take your time, please make sure that the connecting flight should be one.

ASSISTANT: Sorry, there were no flights found on your route.

USER: It's ok, not an issue with that. Thank you for your valuable time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.