Goal: I would like to respond to my friend Thomas.blanc1978@gmail.com by saying, "Okay, thanks for the update
Step instructions:
Swipe up to view the mail by thomas
Tap on the mail by thomas 
Tap on the Reply button at the bottom left corner of the screen
Type the text Okay, thanks for the update
Tap on the send icon at the top right corner of the screen
Actions:
action_type: scroll
direction: down
action_type: click
action_type: click
action_type: input_text
text: Okay, thanks for the update
action_type: click